What's the difference between neurogenic and vascular claudication?

Both neurogenic and vascular claudication can cause pain in the legs when walking. However, beyond this, these two entities are very different.

Pathophysiology

Neurogenic claudication is caused by lumbar stenosis. Vascular claudication is caused by narrowing of arteries which results in decreased blood flow to the legs.

Symptoms

Pain secondary to neurogenic claudication gets better when bending forward because this position widens the spinal canal (leaning on shopping cart/cane, walking up hill, biking). This position does not improve the symptoms of vascular claudication.

Physical Exam

Neurogenic claudication - neuro exam is often normal but can revel single or multiple lumbosacral radiculopathies. Cauda equina and myelopathy can be rare but serious complications. Vascular claudication - decreased peripheral pulses.